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They helped with ensuring Panama's independence in negotiating with France and they paid for the Canal. They built the Canal because it would be a great thing for traveling and for trading. The Canal was of great importance for Both countries and made both countries rich.
W0lf93
Americans wanted to be able to ship items quickly and at a cheaper cost across the country, the construction of the canal enable ships to pass right through the isthmus. The building of the canal also enabled America to shine as an economic and technological world leader. The United States also agreed to guarantee Panamanian independence.